Convert any 3D Game mesh to OBJ for use in blender
Nevermind! I just found a program that lets you get the geometry of any 3D game.

It's called NinjaRipper made by blackninja. It simply takes all meshes that are currently loaded in the system memory or the graphics memory (I don't really know where the model files go when a game is loading) and saves them.

However, it doesn't output the meshes directly .obj files, but it comes with a Blender add-on (along with add-ons for other 3D modeling software) that lets you import the .rip files. It also takes the textures of the models and saves them as .dds files. 

So far NinjaRipper is the only program that is capable of "snapshotting" meshes along with their textures in almost every game. I haven't found a competitive program on the entire internet yet that does the same. I hope that the development of this awesome program continues in the future.